Surely you perceive how full of shit that sounds.
For those that like to read, the book has quite a few ways to reduce and change your hygiene regimen and figure out if you're having reactions to certain products. A bit dry, but definitely made me want to switch to soaps/shampoos/etc with minimal scents and additives.
I don’t see what’s wrong with a “product elimination diet” at all.
It's no different than when you have issues with food:
> An elimination diet involves removing foods from your diet that you suspect your body can’t tolerate well. The foods are later reintroduced, one at a time, while you look for symptoms that show a reaction.
* https://www.healthline.com/nutrition/elimination-diet
You either 'go to zero' and start introducing one new element/variable at a time to see what is causing you issues, or you start at the status quo and remove one variable at a time. It's a controlled 'experiment' on yourself.
And given that she has a private practice, lectures at the University of Toronto, and is associated with a major hospital (which a Level 1 trauma centre), she's hardly some quack.
It helped for a few years for me, then it came back. Only head&shoulders helps (it disappears for a whole day or 2); no other shampoo does anything but make it worse.
> Sensitive skin is one of the most buzzed-about topics in dermatology today. It can be painful, debilitating, and inconvenient. Astonishingly, many of the women and men who suffer from problem skin are unknowingly causing it by washing too frequently and using too many skincare and beauty products. Often, we slather ourselves in creams and balms that can actually damage the skin. The miracle products we buy at department stores, specialty shops, and pharmacies have the potential to make us less attractive and prematurely age our skin.
> In Beyond Soap, leading dermatologist Dr. Skotnicki explains that the best state for skin is the natural state. On its own, the skin is better equipped to fight wrinkles, stave off aging and act as armor that protects the body from infection. Every time we slather, spread, hydrate, or soften the skin, we nudge the skin away from its healthiest natural condition. Skotnicki demystifies the claims of commonly used beauty products and offers a common-sense approach to cleansing the body along with her product-elimination diet that has helped thousands of patients suffering from a wide array of skin conditions, and a skincare regime that will help you maintain skin health, fight aging, and keep your skin reaction-free forever.
* https://www.goodreads.com/en/book/show/35733533-beyond-soap
* https://drsandyskotnicki.com/dr-sandy-skotnicki/